#include <stdio.h>
void changeValue(int* p)
{
    *p = 100;
}
void test01()
{
    int a = 10;
    changeValue(&a);
    printf("%d\n", a);
}
void changePointer(int** val)
{
    *val = 0x008;
}
void test02()
{
    int* p = NULL;
    changePointer(&p);
    printf("p = %X\n", p);
}
int main(int argc, char const *argv[])
{
    //test01();
    test02();
    return 0;
}
